Device for detachment of rims from tires.



m1) SATES PATENT oFFIo FRED PERKI NS, OF WARREN, MASSACHUSETTS, ASSIGNOR TO GEORGIA W.-IPERKINS,

J 015 WARREN, MASSACHUSETTS. V

- .nEvIon ronnnrncmv nivr or imvzs mom TIRES. r

Specification of LettersPatent.

Patented May 18, 1915.

Application filed September 25, 1914. Serial No. 863,593.

f all irlmm it may concern Be it known that I, Fnnn PERKINS, a citizen of the United States of America, and resident of lVarren, in the county of \Vorces- 'ter and State of Massachusetts, have in vented certain new and useful Improvementsin Devices for Detachment of Rims From Tires, of which thefollowing is a full, 7 clear, and exact. description.

This invention relates to improvementsin a device foremployment-in connection with demountable runs for automobile wheels for J eliecting the disengagement .of the tire or I may have a portion inwardly or diametritire shoe from the rim or the reengagement of the rim. with the tire thereon to its normal position. A

The device is especially designed for employment in conjunctionwith a demountahle rim of the kind.known'asthe quick detr-rchahlo and which rim is characterized hvthe making of such rinrtransverselvsplit at one point in its circumferential length (with fastening devices for the ends of the rim at the locatio. of. the cleft) so that, when the ends are unfastened, by, the evertion of force in the proper direction the rim cally contracted so that the tire shoe may he easilv detached from the r m.

provide a device of simple and in'iproved ,constr -iction.which ise'il'ective,v in a quick and convenient manner, for securin a de- .taclnuent; oi the rim tronrits engagement witlrtholire and isalso operable for as quickly and readily bringing the rim, after a tire hasnheen engaged therewith, to its expanded position, in" which it is to lie lockedor secured.

Another ohject of the invention is to provide clamps included as part of the rim disengaging device which are ofnovel and improved construction and adapted for engagcmcnt with rims of ditlerent widths.

The invention is described in conjunction with the accompanying drawings and is set forth in the claims.

In the drawings--Fignre l is aside view of a deniountahle rim in its normal or eX- panded position for the retention of the tire which is indicated interlocked therewith, and representing the rim detaching device as applied in readiness for the detaching operation. Figs. 2 and 3 are similar views showing the initial and completed stages of One object of the present invention is to the detaching operation. Figs. 4 and 5 are transverse sectional views, on a larger scale, through one of the duplicated clamps as taken on line 4.-4, Fig. 1. Fig. 6 is 2. er-

spective view -of the improved device. ig. 7 is a plan view of the clamp operating plate, in detail.

The rim :0 of the kind somewhat extensively used, and known as the quick detachable is transversely split'as indicated 'at 3 so that such rim is completely severed in one point of its circumferential length and so that a portion of the length thereof may be contracted from its position conforming to the complete circular contour; represented in Fig. l to that represented in Fig. 3-,the rim having transversely perforatedears onlugs a0 a: whereby,,by a

locking pinythe rim ends may he detachably secure v The device in which the present invention resides consists of duplicated clamps a, a,

links 6 and 6 each by one end thereof pivotally connected to one of the clamps a, and a lever (Z having one end thereofpivotally connectedto the link (I) and to which adjacent its pointm'f pivotal connection with link Z), it has pivotal connection with-the link b .said lever, moreover, having its free end a transversely extended handle 0.

Each clamp (2. consists of a pair of opposed members f composed of flat thin metal. the upper portions of which [are upwardly and convergcntlv arranged relative to each other while the outwardly extended lower extremities "1 are curved as shown to embrace and. engage the, opposite sides of the rim The members f f of both oi the clamps are hvlhe pivots It connected to the outer ends of the links I) and b v i The upufiii dlv convergentportions of the clamp members haveserrations 1'. i on their outer surfaces. and these serrated memhers a re emlunu-ed h v centrally apertuied clamp operating plates j, j in such manner shown in the last named figures.

(Fig. l), the

in their more or less distended relations clamps a a being gripped to the rim. By then swinging the lever d in the direction of the arrows, the action is to secure the dispositionof the parts so that the different stages of the rim contraction are successively acquired as The device, when the parts thereof are brought to the relations represented n Fig.

' 3', is self-retaining of the relations andv conditions there shown, requiring no effort or attention on the part of the operator who is vpanded"position in true circular then free to'manipulate the tire for its (letachment from the'rim. And, manifestly,

the reversal of the movements of the parts from those required for the contraction oi:

the rimis effective, after an original or a replaced tire has been engaged with the contracted rimflior bringing the rim to its ex contour whereby it may be fastened by the locking pin inserted through the perforated lugs w w.

Each platc j is made with separated slots or apertures j j so that each clamp-memher is individually engaged, such plate be-' ing effective for maintaining the clamp members in their proper relations. The outer margins ofthe apertures 7' are of V- sha-pe for engagement in the serrations i of the members f.

1. 'In a device for detaching rims from tires, the combination with a pair of clamps adapted ior ei'igagement with a split rim at points on opposite vsides of the cleft, links pivotally'connected to the clamps, and a lever having an end portion thereof pivotally connected to one of the links and to which the end of the other link is pivotally con neeted,

, 2. In adevicc i'or detaching rims from tires,- the combinationwith a duplicated pair of clamps, each comprising resilient flat metal members formed with upper portions convergemtly arranged and outwardly ex tended portions terminating in curved eX- tremities adapted to engage the opposite sides of the rim, links pivotally connected to Figs. 2 and 3,

the upwardly convergently arranged pottions of said members, a lever having the end thereof pivotally connected to one of the links and to which the end of the other link is pivotally connected, and means for cansing the transverse contraction of said mem here. 2 l

3. In a device for detaching runs from tires, the combination witha duplicated pair of clamps, each comprising resi lent flat metal members formed with upper portions convergently arranged and outwardly extended portions terminating in curved extremities adapted to engage the opposite sides of the rim, links pivotally connected to the upwardly convergentl'y arranged portions of said members, a lever having the end thereof pivotally connected to one of the links and to which the end of the other link is pivotally connected, and anapertured plate embracing convergent portions of said members and adapted, upon being forced downwardly, to contract same for their clamping engagement with the rim.

In a device for detaching rims from tires, the combination with a duplicated pair of clamps, each comprising: resilient fiat metal members formed with upper portions 'converge'ntly arranged and outwardly extended portions terminating in curved extremities adapted to engage the opposite v sides of the rim, and having serrations on their outer sides, links pivotally connected to theupwardly convergently arranged portions of said members, a lever having the end thereof pivotally connected to one ofthe links and. to Which the end of the otherv link is pivotally connected, and a plate provided with separate apertures, and having its separately apertured portions in embracthe outer margins. of said apertures being,

of V-shape for engagement in said serrations. r g

Signed by me at Warren, Mass, in presence of two subscribing witnesses.

v FRED PERKINS. Witnesses V B. D. PERKINS, S. R. McComson.

ing engagements about said clamp members, f 

